Turn on the first for one min and then turn it off. : Q! `/ A; s8 S# S+ QTurn on the 2nd for five min and then turn it off. ) t; A1 m) m) H" M2 tTurn on the 3rd and leave it on. 1 ]6 a9 M: e- Y. ~5 }# \And then go upstairs right away. ) b& f. N$ r/ F- m; `3 d3 ]+ e7 d! \; C X: R$ Y: U
Find the answer by using your fingers and eyes ( c [( D+ ?; d6 q这只是一个智力问题,不象是电工问题。
原帖由 老警察 于 2009-1-16 07:12 发表 7 \ t5 f0 ]/ Y: i# M5 FTurn on the first for one min and then turn it off.- K2 T0 x0 i$ v3 j9 m& p
Turn on the 2nd for five min and then turn it off., |! K1 W) D3 h
Turn on the 3rd and leave it on. * J& ?) L. \% r1 ~And then go upstairs right away.6 H( F, B! J2 e) _$ H
J: t: z: w0 y. L; k. _' B0 ~) sFind the answer by using ...